London's Pulse: Medical Officer of Health reports 1848-1972

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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London

London County Council 1900

[Report of the Medical Officer of Health for London County Council]

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Table: Table 2. Particulars as to the working of the Bacteria Beds.

Table 2. Particulars as to the working of the Bacteria Beds.

No.Name of town or district.Time during which the beds were in use.Name or number of the bed used.Character of the liquid supplied to the beds.Particulars of the settling and of the detritus tanks.ChemicaU used for treating the sewage previous to bacterial treatment.Number of hourtNumber of fillings per 24 hoursNumbei of contact in successi beds.Quantity of sewage treated in 2-4 hours, per acre ot' ted, one foot deep. e Calculated for the- purpose of comparison Gallons.Arc-rage percentage purification effected on the crude sewage, as measured by the relative quantities of
Occupied in filling the beds.During which th beds renin ine<. full (contact period).Occupied in. emptying the bedsDuring which tnt beds remainid empty (aeratior period;.Oxygen absorbed by the crude sewage and by the final bacteria bed effluent.Albuminoid ammonia present in the crude sewage and in the final bacteria bed effluent.
Capacity. Gallons.Length. Feet.Rate of flow of sewage through the tanks. Gallons per day.Name of chemical.Graina per gallon of sewage.
Average percentage purificationNumber of hours occupied in absorption.Temperature at which absorption took place o F.
1898Lime Sulphate of iron
30Manchester1 Jan., 15 Dec.Roscoe"Chemical" effluent............2.17½2½3l205,840
16 Dec.,,,, ,,.........1.17.........4l208,120
1900
29 Mar, 30 May,,,, ,,.....................4
1900 1901
31 May 20 Feb. L901,,,, ,,.....................3158-7458-1
(coke)
28 Feb., 27 Mar.,,,, ,,.....................2l
1901 190268-3467 1
27 Mar., 26 Mai.,,,, ,,.....................3...157,000(cinder
165,000
20 Nov., 1898,6 septicSeptic sewage.....................1 & 2l
29 April, 1899 1898beds
17-21 Sept.A and BSettled sewage........................12
30 Sept., 26 Oct.,,,, ,,........................22
28 Oct., 16 Nov.,,,, ,,........................32
17 Nov., 3 Dec.,,„ ,, (two filings) and raw sewage (one filling)........................32
3 Dec., 14 Dec.A B and ESettled sewage (two fillings) and raw sewage (one filling)........................33
16 Dec., 1898,,,Raw sewage........................33
7 Feb., 1899
1899
9 Feb., 1 May,, ,,........................43
13 April,31 MayC and DSettled sewage and occasional fillings of storm water........................22
1 June, 7 June,,Open septic tank sewage........................22
8 June, 5 July,,,, ,,...32
6 July, 17 Aug.,,,, ,,...........................42
18 Aug.,14Sept.C,, ,,...........................82
B and DEffluent from primary bed C divided between these beds.....................42
........................
4 Oct., 7 Dec.A and COpen septic tank sewage...........................82
DEffluent from primary beds A and C run on to bed D...........................42
22 Aug., 31 Aug.AOpen septic tank sewage...........................21
1 Sept., 15 Sept.,,,, ,,...........................31
16 Sept.,,,, ,,...........................41
1899 1900
7 Dec. 11 Apr.A and C,, ,,...............continuouson D...1
DEffluent from primary beds A and C...............continuouson D...2
1900
3-30 MayA and CSettled sewage...........................22
DEffluent from primary beds A and C...........................42
31 May, 1900A and CSettled sewage...........................32
27 Mar., 1901DEffluent from primary beds A and C...........................62
1899 1900
7 Dec. 22 Feb 1900BOpen septic tank sewage........................41
2 Mar., 25 April,,,, ,,............continuousequal to61
8 May, 7 June,,,, ,,......'.....................21
1900 1902...............
15 June 26 Mar.,,,, ,,...........................31
1900 1901
11 Jan. 17 JulyIron sand" Chemical " effluent.........Lime2.17............3I90.14845
bedSul1.17............
1900phate
22 MarchFine,, ,,.........of iron...............31166,49685-34826
1899cinder
29 JuneRough,, ,,........................
1900cinder
29 Mar., 30May,,„ „ and storm water............41591453-5
1900 1902•
13 June 26 Mar,,,, ,,............continuous
1900
8 Aug.Stod-Open septic tank effluent..................continuous
dart's
1900 1901
25 Aug.17 Jan.Burnt" Chemical" effluent..................21112,933
pyrites
1901
18 Jan.,,,, ,,..................31
28 Jan., 17 Apr.la 2aOpen septic tank effluent..................11